EC Technology Portable Bluetooth Keyboard, Foldable Wireless Keyboard for iOS/Android/Windows Foldable bluetooth keyboard: folding and ergonomic bluetooth keyboard, Pocket size, sleek and slim design. Compatible 3 major operating system: iOS / Android / Windows. Works with most bluetooth supported devices. Made of Aircraft-grade aluminum for superior rigidity, anodized matte process creates excellent sense of touch. lightweight(6.4 oz) Closed size: 5.8"*3.7"*0.59", Open Size: 9.9"*3.5"*0.2". The keys can withstand up to 3 million keystrokes. Package includes: EC Technology Foldable Bluetooth keyboard, USB charging cable, user manual.